Published at Saturday, February 10th, 2018 - 07:03:36 AM. Sofa. By Elayna Rousset.
At one time, the back of the sofa was constructed and upholstered in exactly the same way as the seat, but using shorter springs. However, to save time, a box spring construction is now used. The springs are held in a metal framework which is nailed to the back frame. This method can be used because the back has less weight to bear than the seat.
You should also find out how any sofa that you are considering has been sprung. Ideally, you should look for a sofa that uses proper springs, rather than pre-fabricated wire coil units, and you should avoid buying sofas that use what are known as zigzag springs, as they won't last as long.
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